The Brazilian iPhone was meant to mark a new era. When Taiwan’s Foxconn Technology Group agreed in April 2011 to make Apple products here, President Dilma Rousseff and her advisers promised that up to $12 billion in investments over six years would transform the Brazilian technology sector, putting it on the cutting edge of touch screen development. Foxconn has created only a small fraction of the 100,000 jobs that the government projected, and most of the work is in low-skill assembly.